PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2019-07-18 NOTE = " EXTRINFO.TXT describes the contents of this directory." END_OBJECT = TEXT END This directory contains the original CDF format SREM data files from which the PDS data products have been produced. Note that the CDF processing level for SREM is different to that used by PDS. The CDF Level 0 files are equivalent to the PDS CODMAC Level2 data, while the CDF Level 2 files are equivalent to the PDS CODMAC Level 5 data. Note the correspondence between the CDF files and their CODMAC Level 2 PDS data equivalents is easily tracked through the filenames: EXTRAS/SREM_ROSETTA_PACC_[DATE].CDF corresponds to DATA/SREM_L2_[DATE].TAB